Hydro Flask began with a challenge: to create a reusable vacuum bottle that truly performs in any environment. It had to keep hot liquids hot and cold liquids cold. It had to be BPA free, lightweight, durable, sweat proof, freeze proof, recyclable, and come with an unconditional lifetime warranty. Hydro Flask met the challenge! The Hydroflask64 oz Wide Mouth Vacuum Insulated Stainless Growler is made from 188 stainless steel with patent pending double wall vacuum insulation that ensures the temperature of the liquid inside never mingles with the temperature of the environment outside. The best part is that this is a two way street whether you've got hot or chilled liquids inside of your Hydro Flask, the internal temperature won't affect the temperature of the container in your hand. That means no blistered fingers with your daily cup of coffee and no troublesome sweat rings from your bottle of ice water. Your hots will stay hot for 12 hours, and your colds will stay cold for 24. Hydro Flask's big, bad, 64 oz Growler is the perfect choice for filling up with your favorite brew, soup of the day, chili of choice, a coffee or hot chocolate warm up, or just a blast of ice water for the trail. Keeps beer and other drinks colder longer than glass containers Double Wall Vacuum Insulated Keeps Hot 12 Hours Keeps Cold 24 Hours BPA Free 188 Stainless Steel Signature Matte Finish Lifetime Warranty Made of 188 stainless steel Mouth Width: 2.19 Size: H 10.38 with cap Diameter: 4.87 Weight: 27 oz